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Which reciprocating saw blade for cutting cast iron pipe?

Tomorrow I have to cut up some 3" sch. 40 cast iron pipe and I was wondering what blade to use on my reciprocating saw. I need something that is readily available everywhere (like the borgs). I also have a diamond encrusted blade from paws off tools which is designed to plow through concrete and other masonry products - would this work?
Any advice offered would be greatly appreciated.

Brian

Itís only work if somebody makes you do it.
A day can really slip by when you're deliberately avoiding what you're supposed to do.Duct tape is like the force. It has a light side, a dark side and it binds the universe together.

I have had good luck cutting large diameter cast iron pipe with a 3M cast iron cutting blade and my circular saw. It's an abrasive blade that wears away as you use it. It is loud and makes a fair bit of dust, but it cuts quick and clean.

"all men dream: but not equally. Those who dream by night....wake in the day to find that it was vanity; but the dreamers of the day are dangerous men, for they may act their dream with open eyes, to make it possible."
T.E. Lawrence

Thanks for the responses guys. The last time I cut CI pipe it took forever to get through. Now that I think about it, the old 4 amp sawzall that I had (and still have) may have been the real problem. That will be solved as soon as the UPS guy gets here - I ordered a new 13 amp sawzall from amazon the other day. That should make a big difference.

Itís only work if somebody makes you do it.
A day can really slip by when you're deliberately avoiding what you're supposed to do.Duct tape is like the force. It has a light side, a dark side and it binds the universe together.

yeah, i use the milwaukee blades from the borg too. there are probably higher quality blades that last longer, but right out of the pack they cut iron easily enough.

agree on replacing the mickey mouse sawzall, a proper size sawzall will make a bigger difference than the blade. i have the same sawzall you ordered, it cuts 1/4 and 3/8 angle iron easily, which should be pretty similar to your pipe.